François Arago, Robert GRANT (F.R.A.S.), Baden Powell, William Henry SMYTH (Rear Admiral.) (1857). “Biographies of Distinguished Scientific Men ... Translated by ... W. H. Smyth ... the Rev. Baden Powell ... and R. Grant”, p.235
Leonhard Euler, C. Truesdell (1980). “The Rational Mechanics of Flexible Or Elastic Bodies 1638 - 1788: Introduction to Vol. X and XI”, p.200, Springer Science & Business Media